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高瓦斯低透气性煤层区域性增加煤层透气性的方法

Release time:2020-10-30 Hits:

Affilication of Author(s):安全工程学院
Disigner of the Invention:孙建中,chengyuanping,王伟,zhouhongxing,刘清泉
Type of Patent:国内
State of Patent:专利授权
Application Number:201310339829.X
Number of Inventors:6
Service Invention or Not:no
Application Date:2013-08-07
Authorization Date:2015-11-04
First Author:wanghaifeng